LOSS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net loss attributable to Altisource	$ (18,475)	$ (35,061)	$ (40,477)	$ (46,711)
Weighted average common shares outstanding, basic (in shares)	15,830	15,601	15,774	15,549
Weighted average common shares outstanding, diluted (in shares)	15,830	15,601	15,774	15,549
Loss per share:
Basic (in usd per share)	$ (1.17)	$ (2.25)	$ (2.57)	$ (3.00)
Diluted (in usd per share)	$ (1.17)	$ (2.25)	$ (2.57)	$ (3.00)
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	1,500	1,500	1,600	1,800
Employee and Nonemployee Stock Options, Restricted Stock and Restricted Stock Units Whose Impacts are Anti-Dilutive
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	300	100	300	200
Options Whose Exercise Price is Greater than Average Market Price
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	200	300	200	600
Options and Restricted Shares Issuable upon Achievement of Certain Market and Performance Criteria That Has Not Been Met
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	1,000	1,100	1,100	1,000